Electric heater for laundry-rolls.



W. s. HArJAW/mJ.R.\` ELECTRIC HEATERfoR LAUNDR'Y R`oLLs. APPLICATION lFILED JULY 13, 1914.

2 SHEETS-SHEET l.

Patented J ah. 11, 1916.

' vv.-s. HADAWAYJR. ELECTRIC HEATER FOR LAUNDRY ROLLS.

APPLICATION man 1uLY13.1914. v Patented Jan. 11, 1916.

2 SHEETS-SHEET 2.

UNiTED FOE.

WILLIAM S. HADAWAY, JR., OF NEW ROCHELLE, NEW YORK.

LECTRIC HEATER FOR LAUNDRY-ROLLS.

Specification of Letters Patent.

PatentedJan. 11, 1916..

Application filed July 13, 1914. Serial No. 850,559..

ica, and a resident of New Rochelle, county of lVestchester and State of New York, have invented certain new and useful Improvements in Electric Heaters for Laundry- Rolls, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof..

My invention relates to electric heating appliances and has special reference to such stationary devices as are adapted for imparting 'heat to laundry rolls or other rotatable bodies.

One object of my invention is to provide a simple, durable and compact heater of the aforesaid character that shall be relatively inexpensive to construct and have no electrically active parts exposed.

Another object of my invention is to provide a simple and compact terminal structure for an electric heater which comprises a plurality of similar units, by means of which more than one heat may be produced, the active heater units being distributed with substantial uniformity for each heat.

Other objects and advantages of my invention will be set forth hereinafter, and in order that my invention may be thoroughly understood, I will now proceed to describe the same in the following specification and then point out the novel features thereof in appended claims.

Referringto the drawings: Figure 1 is a longitudinal section of a heater arranged and constructed in accordance with my invention, and applied to a laundry roll of well-known construction. An end elevation of the same heater, with the cover removed, is shown in Fig. 2. Fig. 3 is a detail view of one of the inter-connecting rings which forms a part of the same heater structure. One of the heater units employed in the complete structure of the previous figure, is shown in Fig. 4, with a portion of the armor broken away to disclose the resistance element and its insulation. .Fig 5 is a longitudinal section of the same heater unit shown on a larger scale.

My improved heater is mechanically independent of the device to which it imparts heat, although it is adapted to be closely associated therewith. Vhile it is capable of being put to a variety of uses, it is particu'- larly fitted for heating a hollow rotatable 4body such as a laundry roll, because-of the fact that the electrically active heat generating parts are rigidly supported from one end and are completely protected by a metal armor. 4When the heater is used with a laundry roll, it is therefore unnecessary that the roll shall be machined or finished on the inside or in anyy special way; in fact no changes or additions to the roll are required. This is not true of many heaters which have hitherto been used and which have exposed heating elements and do not have any means for sealing the opening in a laundry roll, because scale, dirt from the rough interior of the cast iron roll, oil, dust, lint or other ex traneous material are likely to accumulate and be thrown about within the roll, as it rotates in service, and damage the heater..

Although the heater of my present invention is protected so that it will not be daniaged by adverse conditions, such as those above referred to, the casing from which the heater units extend is adapted to engage the outer end of a laundry roll and forni a wip-v ing joint therewith. Outside dirt is, of course, prevented from entering by this means, but another great advantage is secured since the lheat generated within the .roll is prevented from escaping by convection and the eiiiciencyof the apparatus is consequently increased.

The structure illustrated comprises a ringshaped body (5 from which extends an arm or bracket 7, a cover 10 removably secured thereto, a metal plate or disk 11, truss rods 12, asupporting disk or spider 18, heater units 14, and a plurality of inter-connecting rings 15-l-1G-17 to which terminal members are secured as hereinafter pointedbut.

The heater is mounted in a stationary position (the bracket 7 being aixed'to any suitable base or standard, not shown) with the plate o'r disk 11 adjacent to the outer end of a laundry roll 18 or other rotatable object to be heated. The truss rods 12 are screw-threaded ne'ar their ends and are secured to the plate or disk 11 by nuts 19. At their outer ends they are similarly secured to the disk or spider 13 which they support."

The spider has a plurality of radial arms 20 which are overturned at their' ends to form lugs 21.` The armored heater units 14 have the appearance of Vmetal bars and extend through the uniformly spaced holes 22 in the plate or disk 11, being secured at their outer ends to the lugs 21 of the spider 13 by means l f screws 23. A clearance disk 24: which is .materially larger' in diameter than the .resistance ribbon 2 5 which is folded back on itself, so that its two ends are close together',

a metal armor composed of metal bars 26 and 27 welded or otherwise sealed together at their edges and interposed insulating rib-` bons 28 and 29. At the terminal end of the unit a pair of hollow spaced terminal rivets 30 and 31 extend through relatively large holes in the.metal 'strips constitutingthe armor and are in Contact with the respective ends of the resistance ribbon, the arrangement being substantially as shown in detail in Fig. 5, only that portion of the resistance ribbon is slotted, to provide a high resistance path for the electric current, which extends into the laundry roll, the remainder constituting the terminal sections.

The interconnecting ring 17, which is shown in detail in Fig.' 3, is somewhat similar'in structure to the spider 13, being provided with a corresponding number of radial arms 32 and overturned lugs 33. The heater units are secured, and one terminal of each unit is electrically connected to the interconnecting ring 17, a screw 3st extending through the terminal rivet 31 of each unit and into one of the lugs 33 of the interconnecting ring. The interconnecting ring 15 has only four arms which are uniformly spaced and which are connected to four of the twelve heater units, a screw 35 extending through the hollow terminal rivet 30 ot' each unit and into the overturned lug of the interconnecting ring. The interconnecting ring 16 is similar to the ring 15 except that its lugs extend in the opposite direction from those of the ring 15 and are positioned to be connected to the terminal rivets 30 ol the remaining eight units. A terminal member 36 extends laterally from the ring 15 to which it is secured and the rings 1G and 17 are similarly provided with terminal members 37 and 38. The terminal member 37 extends outwardly through the ring l5 t'roln which it is electrically separated, by suitable insulation and the terminal is insulated 'from the rings 15 and 1G through which it tends.

The arrangement of parts is such that a supply circuit may be connected across the terminal 36 and 38 to include one-third of the units, across the terminals 37 and 38 to include two-thirds of the total number ofV units, or both the terminals 36 and 37 may beconnected to one side of the circuit and the terminal 38 to .the outer side, thereby including all of the heater units in the circuit. It is thus evident that the structure shown and described constitutes a. particularly simple and effective means for providing for three dili'erent heats, and sincev the lugs of the interconnecting disks, as far as possible,`are spaced with uniformity in each instance7 the. heat is well distributed irrespective of which combination of heaters is active.

Attention is particularly directed to the fact that the electrically active parts of the structure are all carefully inclosed Within the Vterminal casing, while the parts which extend beyond the disk or plate 11 into the laundry roll are all protected by a metal armor and are simple and strong in construction.

In order to prevent the heat generated within the laundry roll from escaping by convection, I prefer to employ a washer or gasket 39 as shown in Fig. 1, which seals the joint between the end of the roll and the adjacent surface of the casing.

The number of heater units and the details of the structure are not of importance, those illustrated having been chosen for convenience. and I intend that my invention shall onlv be limited by the appended claims.

What I claim is:

1. An inclosed electric heater comprising a casing having a plate adapted to be located in juxtaposition to the open end of a relatively empty hollow rotatablehody, and armored heater units extending from the casing into the space within the hollow hotly.

2. A heater comprising a pair of spaced supporting plates, tie rods secured thereto, a. plurality of armored heater units closed at one end and having spaced terminal members at the opposite end, said armored units being affixed to one ot said supporting plates at their closed ends and extending through uniformly spaced holes in the other supporting` plate, and a casing inclosing the terminal ends of thc heater units and secured to the adjacent supporting plate.

3. A heater comprising a pair of spaced supporting plates, tie rods secured thereto, a plurality ot armored heater units closed at one end and having spaced terminal members at the opposite end, said armored units being affixed to one o't said supporting plates at their closed ends and extending through uniformly spaced holes in the other supporting plate, a casing inclosing the terminal ends ol the heater units and secured to the adjacent supporting plate, and interconnecting rings'within the casing joining different uniformly distributed groups of the units.

il. A heater con'iprising a pair of spaced supporting plates, tid rods secured thereto, a plurality ot' armored heater units closed at one end and having spaced terminal members at the opposite end, said armored units 5. A heater comprising a stationary plate,` a disk, a plurality of outwardly extending truss rods affixed to the plate or disk, a supporting disk secured at the outer ends of the -truss rods, aeplurality of armored units extending outwardly through holes in said plate or disk and afiixed to said supporting disk,v and interconnecting rings adapted to electrically connect the heater units in groups.-

6. A heater comprising a casing having a stationary ring-shaped body, a plate or disk secured thereto and a removable cover therefor, a plurality of outwardlyextending truss rods affixed to the plate or disk, a supporting disk secured at the outer ends of the truss rods, a plurality of armored heater `,units in the form of metal bars extending l outwardly through circumferentially arranged holes in said casing or disk andaffixed to said supporting disk, and interconnecting rings within the casing adapted `to electrically connect the heater units in different groups of uniformly spaced units. ,'7. In combination with a relatively empty hollow rotatable body having an axial opening, a heater therefor comprising a casing having a plate or diskadapted to close the opening in the rotatable body to prevent the escape of heat by convection and heating units extending from the plate into the space within the hollow body.

8. In combination with a hollow cylindrical body open at one end, a heater therefor comprising a casing havingv a stationary ring-shaped body, a plate or disk adapted tov close the opening in the rotatable body to prevent the escape of heat therefrom byA convection, a supporting disk Within the rotatable body spaced from said plate or disk, and a plurality of armored heater units secured to said spaced disks and extending into the casing.

9.'. In combination with a hollow rotatable laundry roll having an opening at one end, a heater therefor comprising a casing having a stationary rin g-shaped body, a plate or disk secured thereto and adapted to close the opening in the laundry roll to prevent the escape of heat by convection-therefrom, and a removable cover for the casing, a plurality 4of truss'rods extending from said plate or disk axially into said laundry roll, a supporting disk secured at the iterends of the truss rods within the laundry roll, a plurality of armored heater units in the form of metal bars extending outwardly through crcumferentially arranged holes in said casing plate or disk and afiixed to said supporting disk, and interconnecting rings within the casing adapted to electrically connect the heater units in diderent groups of uniformly spaced units.

10. A heater comprising-a casing, a plu-V rality of armored heater units extending outwardly through circumferentially arranged holes in said casing and interconnecting rings within the casing adapted to velectrically connect the heater units in different oups of uniformly spaced units."

11. A heater4 comprising a casing, a plurality of armored heater units having the appearance of metal bars extending outwardly through circumferentially arranged holes in said casing and interconnecting rings within the casing adapted to electrically connect the heater units in different groups of uniformly spaced units.

In witness whereof, I have hereunto set my hand in the presence of two subscribing -witnesses, this 8th day of July, 1914.

Witnesses z F. GRAVES, E. COHEN. 

